Sound intensity level

Sound intensity level or acoustic intensity level is a logarithmic measure of the sound intensity in comparison to the reference level of 0 dB (decibels).

The measure of a ratio of two sound intensities is

$L_J=10\, \log_{10}\left(\frac{J_1}{J_0}\right)dB$

where J₁ and J₀ are the intensities.

The sound intensity level is given the letter "L_J" and is measured in "dBW". dB is dimensionless.

If J₀ is the standard reference sound intensity, where

$J_0 = 10^{-12} \frac{W}{m^2}$

(W = watt), then instead of "dB" we use "dB SWL". (SWL = sound intensity level).

External link

Conversion: Sound intensity level to sound intensity (http://www.sengpielaudio.com/calculator-soundlevel.htm)

de:Schallintensitätspegel

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